Hand-micro telephone.



W. W. HENRY.

HAND MICR() TELEPHONE. APPLICATION FILED JUNE I9, |914-l 1 ,204,765. Patented Nov. 14, 1916;

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WILLIAM WEIR HENRY, 0F WOLLASTON, MASSACHUSETTS, SSIGNOR TO S. H. COUCH COMPANY, INC., 0F ATLANTIC, MASSACHUSETTS, A. CORBORATION 0F MASSACHU- SETTS.

HAND-MICRO TELEPHONE.

montes.

Specification of Letters Patent i Patented N017., 14, 1916,

Application filed J' une 19, 1914. Serial No. 846,153.

To all whom it may concern:

Be it known that I, WILLIAM Winn HENRY, of Wollaston, a citizen of the 'United States, and residing at the above place, in the county of Norfolk and State of Massachu# setts, have invented certain new and useful Improvements in Hand-Micro Telephones, of which the following is a specification.

rlhis invention relates to hand-micro telephones, and has particular reference to the unit system of mounting the-various parts upon the frame, as well as to the various improvements in the detail of switches, transmitter mountings, etc., as will later appear. The demands of the trade require various styles of hand-micro telephone equipments, from those using but two sets of transmitter and receiver mechanism, connected by a single circuit and battery, to those which furnish a number of circuits for inter-communication. l have found it desirable to form the circuit connectors or terminals j upon a. single, removable base-plate which is adapted for mounting upon the frame at any point distant from the assembly room, and, in this manner, the same frame is adapted, without change, for any system of wiring desired.

ln the drawings, which form part of and accompany this specification, and which illustrate the preferred form of my invention,-Figure 1 is a vertical, central section ofmy assembled unit. Fig. 2 is a rear, planl view, with cover removed. Fig. 3 is a section on line 3 3 of Fig. 1, enlarged. Fig. 4 is a section on line 4-4 of Fig. 1. Fig. 5 is a detail. 6 is a. 'diagram showing one form of wirmg.

' different' circuit .connectors which may be The -frame 1 is preferably made of a flat,

metal plate with a suitable aperture 2 by which the phone may be hung against the wall whennot in use. ordinary construction, is mounted on frame 1 by means of screws f1. f The'transmitter 5 is mounted at the other end of frame 1 by means of screws 6.v By an inspection of the drawings, it will be noticed that by. this method of mounting, the transmitter, receiver and frame constitute what l will call unitnumber one, the samebeing adaptable, without change, for

in turn mounted upon the base-plate 7 of unit numberv two, the latter to be now described.

'plate 7 properly punched and threaded to receive rlhe receiver 3, ofv

, than frame 1, so that cover 8 may form a neat closure with frame 1. Baseplate 7 is provided with openings to register with two pilot pins 9 which are struck up from frame 1 for easy assembling, and the two screwposts 10, which thread into frame 1, hold firmly in place. Base-plate 7 is the circuit connectors and push-buttons, the latter being adapted to project through 'suitable openings in frame l.

I' have illustrated plate 7 as supporting four vertical pairs of connectors, of which the upper (or rear) are lettered B, C and D. The corresponding lower connectors are lettered ai, c and d. The first three pairs are for talking and for receiving a bell call, the last being adapted for sending a ringing call to some distant unit.' 'A and a are shown (see Fig. 3) as being electrically united to furnish the common wire connection. B and and C and c are shown insulated from each other, and each must have its separate wire, if it is to enter into the scheme of circuits. lt will be noticed that connectors A, B, C, a, b and e are shown as being rigid, connections vbeing .made

through the agency of a multiple tined flexible switch 15, lsecured to the insulated base 16 of the push-button 17 by a screw 18, and held in place by the pilot pins 19. The

purpose of using a flexible switch (which is ,not directly wired to any connector) is to secure a wiping contact of-a positive character, thus insuring good connection..

By forking the switch 15, I secure greater elasticity and also prevent any interference in the-contacts, in case of slight variations of assembling; that is to say, with the switch 15 formed in one broad band, one of the contacts mightl be weakened by reason of the f undue prominence of one of the other connectors. l Y

Push-button 17 is mounted on a flat, metal spring 20, the latter being secured to plate 7 by screw 21. PilotsA 22 and 23 serve to maintainthe relative positions of theparts and an ear 24 on spring 20 furnishes a stop for the yielding of button 17, when under pressure. Push-button 25 is shouldered, as at 26, to prevent its dro ping out when unit number two is separate f from unit number Suitable openings 27 and 28 areprovided1 in base-plate 7 and frame 1 for the assembling of the wires. An opening 29 in cover 8, provides for the entrance of the cord.

Referring to Fig. 2,-the formlof service rendered by switch member 15. will now be noticed.

' Assume that connectors B and C are wired in the talking circuit so that there is a break that must be bridged by switch 15. Also, assume that connector b is wired in the circuit for receiving a ring from a diswith respect to receiver 3. As the threaded shank of mouth-piece 30 is screwed to' a shouldered nipple 32 which is held within the casing 33 of transmitter 5, I preferably form nipple 32 with a lug 34 adapted to occupy one of a series of notches;V 35 arranged around the periphery of the opening 36 which receives nipple 32. If itis found that mouth-piece 30 does not register properly, it may be slightly unscrewed and,

' other of the notches 35.

by pressing inward, the lug 34 disengages its particular notch 35, whereby nipple 32 may be turned to bring lug 34 opposite anproper notch 35, mouth-piece 30 may be brought into proper register with the receiver 3. A spring 37,. preferably formed with three feet 38 (see Fig. 4) may be em' ployed to retain the nipple 32 in position when mouth-piece 30 is unscrewed.

I do not limit myself, tothe precise construction illustrated.

What I claim is:

1. In a hand-micro telephone, a transmitter casing adapted to be mounted on a suitable frame, a curved mouth-piece Aadapted to be screwed into position against said casing, said casing having a notched opening adapted for the projection therethrough of a threaded nipple; i n combination with a threaded nipple or bushing adapted to receive the end of said mouth-piece, said nipple being provided with a projection By selecting the notches surrounding said opening for the purpose of preventing relative rotation of said nipple when so engaged.

2. In a hand-micro telephone, a trans mitter casing adapted to be mounted on a suitable frame, a curved mouth-piece adapted to be screwed into position against said casing, and a threaded nipple or bushing adapted to receive and'secure said mouthpiece against said casing, means for adjustably securing said nipple against rotation upon and within said casing, and elastic means for holding said nipple in locked position upon said casing.

3..In a hand-micro telephone, Aa frame whose face is adapted for the mounting thereon of Suitable receiver and transmitter mechanism; a metallic base-plate adapted for the mounting thereon of all the necessary buttonsand switches; means for removably securing said base-plate to the back of said frame; and a cover adapted to be secured over said base-plate.

4. In a hand-micro telephone, a frame adapted for the mounting thereon of suitable receiverand transmitter mechanism; a metallic base-plate adapted for the mounting thereon of all the necessary buttons and switches; means for removably securing said base-plate tosaid frame; and a cover adapted to be secured to said means.

5. In a hand-micro telephone, a frame whose front is" adapted for the mounting thereon of suitable receiver and transmitter mechanisms; a metallic base-plate adapted for the mounting thereon -of all the necessary switches and buttons; means for removably securing said base-plate to the back of said frame; means whereby said buttons may be manipulated from the front of said frame; and means for inclosing said switches.

6. In a hand-micro telephone, a frame adapted for the mounting thereon of suitable vreceiver and transmitter mechanisms; a metallic base adapted for the mounting thereon of all the necessary' buttons and switches; means for removably securing said base to said frame; and covering means adapted to conceal said switches.

In testimony whereof, I have affixed my signature, in the presence of two witnesses.

Witnesses:

ALToN E. STEVENS, SADIE L. BENNETT.

WILLIAM WEIR HENRY. 

